RF 스퍼터를 이용하여 미리 가열된 기판을 냉각하며 증착한 ZnO 박막의 c축 배향성 향상에 관한 연구

Improvement of c-axis orientation of ZnO thin film prepared on pre-heated substrate with cooling during RF sputter deposition

In this paper, ZnO thin films were prepared on p-Si(100) by RF magnetron sputtering. Before the depostion, the substrates were pre-heated to 500, 400, 300, $200^{\circ}C$ or not. During the deposition, the substrates were cooled down naturally or kept and then the films were investigated by XRD(X-ray diffraction) and SEM (scanning micro scope). It is showed the most outstanding result that the film was prepared on the substrate were cooled from $400^{\circ}C$. When the substrate was cooled from a certain temperature during deposition, it could be improve the c-axis orientation and useful for application of SAW(surface acoustic wave) filter and FBAR(film bulk acoustic wave resonator) device.